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Vegetable insulating oil composition as well as preparation method and application thereof

A technology of vegetable insulating oil and composition, applied in lubricating composition, petroleum industry, etc., can solve the problems of high viscosity of insulating oil, difficult to biodegrade, easy to solidify, etc. high rate effect

Active Publication Date: 2019-02-15
江苏樱花化研化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the early days, mineral oil was used as the base oil of insulating oil because it has good electrical insulation, cooling and low cost, but mineral oil has a low flash point and low flash point, which cannot meet the requirements of high fire performance; and it is difficult to biodegrade. Once leaked, it will cause pollution to water sources, living environment, etc.
To solve this problem, petroleum-based high-flash point oils and difficult-to-burn oils, such as α oil, β oil, and silicone oil, were developed later. However, the cost of such base oils is too high to be popularized and used.
[0004] The vegetable insulating oil currently marketed has the advantages of high flash point, low cost, and biodegradability. For example, Chinese patent CN102682869A discloses a vegetable insulating oil and a preparation method thereof. The insulating oil is composed of refined vegetable oil and low-molecular alcohol React under the action of a catalyst, add antioxidant and pour point depressant after removing impurities, but this kind of insulating oil has high viscosity, poor cooling effect, and is easy to solidify at low temperature, and if it is used for transformers or other cooling insulating oils , it is necessary to modify the design of transformers or other electrical appliances, and the cost is relatively high

Method used

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  • Vegetable insulating oil composition as well as preparation method and application thereof
  • Vegetable insulating oil composition as well as preparation method and application thereof
  • Vegetable insulating oil composition as well as preparation method and application thereof

Examples

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Effect test

preparation example Construction

[0041] As a preferred version, the preparation method of the vegetable oil fatty acid monohydric alcohol ester comprises the steps:

[0042] After the aliphatic monohydric alcohol is heated and vaporized, it is continuously sprayed into the vegetable oil mixed with the catalyst, and the esterification reaction or transesterification reaction is carried out at 100-190°C to obtain the esterification product or the transesterification product;

[0043] The esterification product or the transesterification product is subjected to distillation and purification, and the vegetable oil fatty acid monohydric alcohol ester is collected.

[0044] As a preferred solution, the catalyst is used in an amount of 0.01-0.5% by total weight of vegetable oil and aliphatic monohydric alcohol.

[0045] As a preferred solution, a stabilizer may also be added when preparing the vegetable oil fatty acid monohydric alcohol ester, and the stabilizer is selected from propylene glycol methyl ether acetate...

Embodiment 1

[0065] The present embodiment has prepared vegetable oil fatty acid monohydric alcohol ester 1#, specifically comprises the following steps:

[0066] 1. Weigh 60kg of coconut oil, 40kg of absolute ethanol and 0.01kg of aluminum oxide respectively, and set aside;

[0067] 2. Add coconut oil and alumina in the reaction kettle in advance, heat to 100°C, start the circulation pump, and return to the reaction kettle through the jet pump;

[0068] 3. The absolute ethanol is converted into a gas phase through a gasifier, and after being efficiently mixed by a high-pressure jet pump, it is sprayed into the reaction kettle. At 100°C, it is esterified with coconut oil to obtain an esterified product, and the reaction time is 1.5 hours;

[0069] 4. Transfer the esterification product into a distillation tower, carry out distillation and purification under the condition of residual pressure of 50Pa and temperature of 120-240°C, remove unreacted monoalcohol, mono / diester, black oil, etc., ...

Embodiment 2

[0071] The present embodiment has prepared vegetable oil fatty acid monoalcohol ester 2#, specifically comprises the following steps:

[0072] 1. Take by weighing 70kg of coconut oil, 30kg of n-propanol, 0.5kg of aluminum trichloride, and 0.1kg of propylene glycol methyl ether acetate, respectively, for subsequent use;

[0073] 2. Add coconut oil and aluminum trichloride to the reaction kettle in advance, heat it to 160°C, start the circulation pump, and return it to the reaction kettle through the jet pump;

[0074] 3. The propanol is converted into a gas phase through a gasifier, injected into the reactor by a high-pressure jet pump, and subjected to an esterification reaction with coconut oil at 190° C. to obtain an esterified product, and the reaction time is 1.5 hours;

[0075] 4. Transfer the esterification product into a distillation tower, carry out distillation and purification under the conditions of a residual pressure of 50 Pa and a temperature of 120-220°C to remo...

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Abstract

The invention relates to a vegetable insulating oil composition as well as a preparation method and application thereof. The composition comprises vegetable oil monohydric alcohol fatty acid ester, vegetable oil polyhydroxy alcohol fatty acid ester and a metal ion chelating agent, wherein the weight ratio of the vegetable oil monohydric alcohol fatty acid ester to the vegetable oil polyhydroxy alcohol fatty acid ester is (20-60): (40-80); the dosage of the metal ion chelating agent is 0.01-0.03% of the total weight of the vegetable oil monohydric alcohol fatty acid ester and the vegetable oilpolyhydroxy alcohol fatty acid ester. In the invention, coconut oil and palm kernel oil are taken as raw materials for producing environment-friendly vegetable insulating oil; the prepared environment-friendly vegetable insulating oil has the characteristics of being good in oxidation stability, transparent in color, low in viscosity and high in cooling efficiency, therefore, the use requirementsof a special transformer in some overload state can be met.

Description

technical field [0001] The invention relates to a vegetable insulating oil composition and a preparation method thereof, belonging to the technical field of industrial lubricating oil. Background technique [0002] Insulating oil is a type of lubricating oil. It is usually prepared by adding additives such as antioxidants to highly refined lubricating oil base oil. It is mainly used as a dielectric for electrical equipment. The main properties of insulating oil are low temperature performance, oxidation stability and flow performance. [0003] In the early days, mineral oil was used as the base oil of insulating oil because it has good electrical insulation, cooling and low cost, but mineral oil has a low flash point and low flash point, which cannot meet the requirements of high fire performance; and it is difficult to biodegrade. Once leaked, it will pollute water sources and living environment. In order to solve this problem, petroleum-based high-flash point oils and ...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M177/00C10N40/16C10N30/08C10N20/02
CPCC10M169/04C10M177/00C10M2207/2835C10M2207/2815C10M2215/04C10N2030/08C10N2030/02C10N2030/64C10N2040/16
Inventor 戴志荣王桂东平云莉戴荣芳
Owner 江苏樱花化研化工有限公司
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